Is this what we call runoff? This Thursday, INSEE published data on the evolution of the population as of January 1, 2021. If Paris continues to lose inhabitants, Île-de-France continues to gain them, despite a slowdown in its population growth.
With 12,317,279 inhabitants, the region remains the most populated in France. It represents 18% of the French population (excluding Mayotte). But if it gained 39,200 inhabitants each year between 2015 and 2021, the statistics institute notes a slowdown in demographic growth in Île-de-France, which amounts to “only” 0.3% per year over the period. , compared to 0.5% between 2010 and 2015.
Paris, too expensive, too complicated
One of the culprits of this drop in the increase is none other than the capital which lost “on average 12,200 inhabitants per year”, an annual drop of 0.6%, notes INSEE.
The other reason, even more important, raised by the institute is the migratory deficit with fewer arrivals than departures, motivated by the high cost of housing or “the search for another living environment”.
Three departments are boosting the region, others are aging
But if the capital is pulling down the demographic figures, other departments in the region are doing much better. This is the case of Val-d’Oise and Seine-et-Marne (+0.6% per year), Essonne (+0.5%) and Seine-Saint-Denis, which with 12,700 additional inhabitants per year, there is annual growth of 0.8%.
If Hauts-de-Seine and Yvelines contribute to the increase in the regional population with an increase of 0.3% each, their natural balance (difference between the number of births and the number of deaths) has decreased compared to 2010-2015 leading to “more marked aging of the population”.
Boulogne-Billancourt, still the second largest city in the Paris region
According to the census carried out in 2021, Boulogne-Billancourt remains the second most populous city in Île-de-France, after Paris, with 119,808 inhabitants. A population increasing by 0.3% per year. Saint-Denis (93) completes the podium with 113,942 inhabitants (+0.4%).
Far behind, Gennevilliers (49,410 inhabitants), Bagneux (43,699) and Clichy (64,849) still win a medal, that of the towns which experience the highest annual change in their population with respectively +9.83%, +9 .63% and +6.8% inhabitants in six years.